v0.3.3

[0.3.3] - 2026-06-19

Leaner base install + the refreshed README on PyPI.

Changed

• Dropped the unused fastembed dependency from the base install (and the
  heavy onnxruntime wheel it pulled). It was a leftover from the original
  feat-005 plan to default to local embeddings; the shipped embedders are
  bedrock / openai / fake, none of which import it. Removing it keeps the
  promise true: the base install carries only what the engine actually uses, and
  every model/DB provider is opt-in. (No local-embeddings driver existed, so
  nothing is lost; a fastembed driver behind a [local] extra can be added as
  a deliberate feature later.)
• README refreshed (out-of-the-box overview, quick start, demo) now renders on
  the PyPI project page.